In brief:
See below

The gold standard for detecting renal artery occlusion is a renal angiogram, which is injecting a iodinated dye into the blood vessel and taking images.

The dye itself can cause some reversible renal injury, and should be used weighing the risk and benefit. Other rare but serious complication is cholesterol embolii syndrome. Other tests eg ultrasound and MRI may not be conclusive.

In brief:
See below

The gold standard for detecting renal artery occlusion is a renal angiogram, which is injecting a iodinated dye into the blood vessel and taking images.

The dye itself can cause some reversible renal injury, and should be used weighing the risk and benefit. Other rare but serious complication is cholesterol embolii syndrome. Other tests eg ultrasound and MRI may not be conclusive.
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In brief:
Renal artery bruit

This is a sound heard by stethoscope in abdomen.

Magnetic resonance angiogram (mra) is a non-invasive radiologic study which can demonstrate the occlusion. Sometimes diagnosed by ct scan with intravenous contrast. Finally diagnosed or confirmed by renal arterial angiogram performed by interventional radiologist prior to angioplasty.

In brief:
Renal artery bruit

This is a sound heard by stethoscope in abdomen.

Magnetic resonance angiogram (mra) is a non-invasive radiologic study which can demonstrate the occlusion. Sometimes diagnosed by ct scan with intravenous contrast. Finally diagnosed or confirmed by renal arterial angiogram performed by interventional radiologist prior to angioplasty.
Would you like to video or text chat with me?